CDC Sets 1-3-6 Benchmarks for Childhood Hearing Loss Screening and Intervention

What the CDC's Hearing Screening Guidance Says

The Centers for Disease Control and Prevention (CDC) has published updated guidance on hearing screening and testing for children, emphasizing that early detection is critical to a child's development. Hearing screening is a simple, painless test that takes only a few minutes and indicates whether a person might have hearing loss. It is not a diagnosis — it is a first check that determines whether a full hearing test is needed.

The CDC recommends that all babies be screened for hearing loss no later than 1 month of age, ideally before leaving the hospital after birth. If a baby does not pass the screening, the agency stresses that a full hearing test — also called an audiology evaluation — should be conducted as soon as possible, but no later than 3 months of age. If hearing loss is confirmed, the child should be enrolled in early intervention services before 6 months of age. These three milestones are known as the 1-3-6 benchmarks, part of the Early Hearing Detection and Intervention (EHDI) program.

For children at risk of acquired, progressive, or delayed-onset hearing loss — meaning hearing loss that develops after birth or worsens over time — the CDC recommends at least one hearing test by 2 to 2.5 years of age. Parents and caregivers who suspect a child has hearing loss are urged to trust their instincts and ask a doctor for a hearing test as soon as possible, without waiting.

The guidance also explains the types of tests an audiologist may use. The Auditory Brainstem Response (ABR) test measures the brain's response to sound using electrodes placed on the head, and can be performed while the child is asleep. The Otoacoustic Emissions (OAE) test checks the inner ear's response to sound using a sensitive microphone in the ear canal, also without requiring the child to respond actively. Behavioral Audiometry Evaluation tests how a person responds to sound overall and requires the child to be awake; infants and toddlers are observed for behavioral changes such as quieting or searching for the sound, and may be rewarded with animated toys (Visual Reinforcement Audiometry) or play-like activities (Conditioned Play Audiometry).

Why the 1-3-6 Timeline Matters for Child Development

Why the 1-3-6 Benchmarks Exist

The CDC's 1-3-6 framework is not arbitrary. It reflects decades of research showing that the first six months of life are a critical window for language acquisition. When hearing loss is identified and intervention begins within that window, children are far more likely to develop age-appropriate communication and social skills. Delays in detection push back the start of intervention, which can widen developmental gaps that become harder to close later.

The Role of Hospitals and Audiologists

The recommendation to screen before leaving the hospital places much of the initial responsibility on maternity wards and newborn care providers. When a baby does not pass, the handoff to an audiologist for a full evaluation becomes the next critical step. Audiologists not only administer tests like ABR, OAE, and Behavioral Audiometry but also gather birth history, check for ear infections, and ask about family history of hearing loss — all of which help determine the type and degree of hearing loss.

What This Means for Parents

The guidance is clear that parents should not wait if they suspect hearing loss. Because screening is quick and painless, there is little downside to requesting one. For children with risk factors for progressive or delayed-onset hearing loss, the recommendation for at least one test by 2 to 2.5 years ensures that conditions that develop after the newborn period are not missed.

What Parents and Caregivers Should Do

If you are a parent or caregiver, the single most important step is to act early — do not wait if you suspect hearing loss.

• Ensure your baby is screened for hearing loss before 1 month of age, ideally before leaving the hospital.
• If your baby does not pass the screening, schedule a full audiology evaluation as soon as possible, and no later than 3 months of age.
• If hearing loss is diagnosed, enroll your child in early intervention services before 6 months of age.
• If your child is at risk for acquired, progressive, or delayed-onset hearing loss, ask your doctor about at least one hearing test by 2 to 2.5 years of age.
• Trust your instincts: if you think a child might have hearing loss, ask the doctor for a hearing screening immediately.